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戴姆勒小客車中國市場風險分析

為了解決Usa smart fortwo的問題，作者德希蒙 這樣論述：

The Chinese market for Automobiles underwent a rapid development in the last 40 years and now is the biggest market in the world. Many foreign carmakers also entered the market, mostly through joint venture agreements with local companies.
Daimler AG is the mother company of the oldest car brand in

the world, Mercedes-Benz. For Daimler’s passenger car business, China became the single biggest market in 2015 and the company is now active in the market with different joint ventures operating R&D, production and sales facilities. The sheer size of the Chinese automotive market offered and offers

great opportunities for Daimler’s passenger car business but also exposes the company to certain business risks: Firstly, a slowdown in general economic growth and a less dynamic automotive market naturally impose a risk on a company who sells a big proportion of its cars in China. Recently, the ma

croeconomic situation is also influenced by the US-Chinese trade disputes. Secondly, within the markets there are certain risks threatening Daimler’s market position such as new customer preferences for mobility services instead of car ownership, not being able to keep up with the demand for electri

c vehicles, losing customers’ trust as well as risks that come with the joint venture relationships as well as the legal environment in China. This thesis aims at assessing Daimler’s management of these risks by using statements given by top managers over the past years.

複合輪胎力估測器於多動力馬達電動車驅動力矩分配策略之整合應用

為了解決Usa smart fortwo的問題，作者陳建國 這樣論述：

本研究提出一新型輪胎縱向力複合估測法，整合單輪分析及整車分析兩種不同的估測方法，並以本實驗室之多動力馬達電動車作為架構，實車採用15-kW直流無刷馬達搭配傳動齒輪箱，作為前輪之間接驅動動力源；後輪則由兩顆7-kW永磁同步馬達置於輪內，作為後輪之直接驅動動力源。此多馬達之動力架構能藉由操作各馬達的輸出力矩於高效率區間，達到提升整體行車效率與續航力之效果。而本研究係以本實驗室之電動車所配置的感測器，設計一套估測輪胎力(F_x,F_y,F_z)的估測器，進而使節能策略及安全策略能實行在實車上，而不單單只有在電腦模擬上完成，此估測器在行車過程中將提供估測值給整合車身穩定控制做判定依據，並根據駕駛者的

油門及煞車命令，即時分配各馬達之驅動力矩及回充煞車力矩，以將各馬達持續操作於高效率區域，使行車時能在滿足駕駛者的加速性需求下，將行車效率最佳化，並且避免輪胎打滑與轉向失控的問題。本研究以模型迴路(model-in-the-loop, MIL)驗證輪胎力估測器及力矩分配策略之性能，將車輛模型建置於CarSim之中，並設計輪胎力估測器以提供數據給控制策略進行運算，實驗結果顯示，其確實能在不失駕駛者對車輛動態之需求與行車安全為前提下，在加速、煞車、直行以及轉向操作時，即時的分配馬達力矩以達到節能行車之效果，而複合輪胎縱向力估測器之估測值明顯優於以單輪受力圖為基礎設計之估測器，而誤差改善的幅度達到60

%~97%，尤其在前輪(左、右)皆有著更加顯著的差異，並在導入數值給車身穩定系統時，能達到更符合預期的行車結果。